Actually, I went ahead and changed Angkor Wat to Versailles, primarily for two reasons:
1. My defense is already decent (since I'm Japanese), and I really needed a way to augment the health of my troops. My unique troops, Ashigaru, have high dps, but average hp, so I wanted to give them more hp so they could take dish out damage and still come home to tell the tale.
2. I've had Angkor Wat for quite some time, and the best way to utilize it is to put it right in the center of your base and protect it. Over time, the situation has become more of a liability rather than an asset. Changing to Versailles gives me one less building to protect, and one more building to use as a buffer against enemy troops.